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[Gorath Alpha]

If you are getting the error message from the Demo that it cannot detect a supported video graphics card, it probably means that you overlooked the requirements (video in Boldface emphasis):

      Minimum:
      OS: Windows XP 32-bit with SP3
      OS: Windows Vista 32-bit with SP2
      OS: Windows 7
      CPU: Intel Core 2 Duo (or equivalent) running at 1.8 GHz or greater
      CPU: AMD Athlon 64 X2 (or equivalent) running at 1.8 GHz or greater
      RAM: 1 GB (1.5 GB Vista and Windows 7)
      Video: Radeon HD 2600 Pro 256 MB (should be 2600 XT or
               X1800 GTO)
      Video: NVIDIA GeForce 7900 GS 256 MB cards
               (unless this should be 7800 GS)
      Disc Drive: DVD ROM drive required
      Hard Drive: 7 GB
      Sound: Direct X 9.0c Compatible Sound Card Windows Experience
               Index: 4.5

You need at least a Mainline Gaming card ("n600" for Radeons and older Geforces, or "n50" for newer Geforces), newer than a 2004 design.  The older minimum card only offers the Dx9 version of Direct3D.

You also need a modern full-powered CPU, not a Celeron / Pentium Dual / P4 / Sempron. 

Only Desktop style PCs provide a convenient upgrade route for video graphics upgrades.  For all practical purposes, you upgrade a laptop by replacing it entirely. 

The official minimum Radeon is the HD 2600 Pro, a year newer than the Geforce minimum card, with Dx10 shader capability.  The Geforce only offers Dx9 functions.  Neither of those are available new, so the effective minimum Radeon becomes the three year old HD 3850, which is already in very short supply.  A Geforce 9600 GT is probably nVIDIA's oldest available equivalent to a 7900 GS.  To be most practical, you probably have to purchase at least a Radeon HD 4770 or a Geforce GTS250, although once again, the Radeon will have Dx11, while the Geforce only offered Dx10 then. 

There are other circumstance that can result in this error message.  You can have broken links between three of the softwares needed for the graphics, starting with the Graphics Driver, continuing with Direct3D (DirectX), and then finishing with the Demo.  One may have a corrupted file.  Start with the easiest, the Driver, then retest.  Next, run installs of Dx11, followed by Dx9, and retest.  Last, uninstall the Demo and reinstall it. 

Finally, be sure you have your screen set to a proper ratio for your display.  Setting up a wide screen to a 4:3 ratio, and vice versa, can confuse this particular part of the Demo.


Gorath

Modifié par Gorath Alpha, 26 février 2011 - 07:42 .

[Gorath Alpha]

Don't forget this part:

There are other circumstances that can result in this error message.  You can have broken links between three of the softwares needed for the graphics, starting with the Graphics Driver, continuing with Direct3D (DirectX), and then finishing with the Demo.  One may have a corrupted file.  Start with the easiest, the Driver, then retest.  Next, run installs of Dx11, followed by Dx9, and retest.  Last, uninstall the Demo and reinstall it. 

Finally, be sure you have your screen set to a proper ratio for your display.  Setting up a wide screen to a 4:3 ratio, and vice versa, can confuse this particular part of the Demo.

Gorath